Exhaust system for IO540

[Al Paxhia]

I just did 2.5 hours of testing with a new Forsling Aviation exhaust system.
The data looks very good, but I'm not sure I understand it all.
Cylinder temps have dropped 30-35 degrees. They range from 326 to 360. The
exhaust temperatures are more balanced. At cruise 23"MP and 2300 rpm, full
rich now burns 16.4gal/hr this is an increase of .4 gal/hour, but when
leaning the temps are balanced to a flow of 13 gal/hour. If I go LOP the
flow is even lower and temp are all good. Oil temp was about 190 about the
same.
I've put some pictures out, if your interested.
If anyone is interested in the old system its for sale, it's a good system
if your running a 260 hp, 540. Contact me offline.
Al
Moose, N526AP, paxhia2@comcast.net




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[gill.sr25]

Al,

What OAT were you operating at when you were seeing the CHT's?

Chris Gill
SR2500, Anchorage, AK
907-227-9352

On 2/16/2004 9:56 AM, PAXHIA2@COMCAST.NET wrote to MURPHY-REBEL:

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-> Message-ID: <000801c3f063$2bf98ff0$6401a8c0@NEWCOMPUTER>
-> From: "Al Paxhia" <paxhia2@comcast.net>
-> To: <murphy-rebel@dcsol.com>
-> References: <001901c3f048$600619f0$ad05efd1@Thinkpad>
-> Subject: Exhaust system for IO540
-> Date: Tue, 10 Feb 2004 21:52:01 -0800
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-> X-Antivirus-Remover: Message was filtered through wsMailGuard (wsAV)
->
-> I just did 2.5 hours of testing with a new Forsling Aviation exhaust system.
-> The data looks very good, but I'm not sure I understand it all.
-> Cylinder temps have dropped 30-35 degrees. They range from 326 to 360. The
-> exhaust temperatures are more balanced. At cruise 23"MP and 2300 rpm, full
-> rich now burns 16.4gal/hr this is an increase of .4 gal/hour, but when
-> leaning the temps are balanced to a flow of 13 gal/hour. If I go LOP the
-> flow is even lower and temp are all good. Oil temp was about 190 about the
-> same.
-> I've put some pictures out, if your interested.
-> If anyone is interested in the old system its for sale, it's a good system
-> if your running a 260 hp, 540. Contact me offline.
-> Al
-> Moose, N526AP, paxhia2@comcast.net
->
->




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[Al Paxhia]

Chris,
The OAT was 35-40 F on that day. Last week went up to Abbotsford, about an
hour flight, CHT was as high as 370 with the OAT in the high 50's(best
weather in a long time). Al
----- Original Message -----
From: <gill.sr25@dcsol.com>
To: <murphy-rebel@dcsol.com>
Sent: Monday, February 16, 2004 10:58 AM
Subject: RE: Exhaust system for IO540

Al,

What OAT were you operating at when you were seeing the CHT's?

Chris Gill
SR2500, Anchorage, AK
907-227-9352

On 2/16/2004 9:56 AM, PAXHIA2@COMCAST.NET wrote to MURPHY-REBEL:

-> Received: by dcsol.com (Wildcat! SMTP Router v5.7.450.9b10)
-> for murphy-rebel@dcsol.com; Tue, 10 Feb 2004 20:53:20 -0900
-> Received: from ([204.127.202.64]) EHLO=sccrmhc13.comcast.net
-> by dcsol.com (Wildcat! SMTP v5.7.450.9b10) with SMTP
-> id 609685812; Tue, 10 Feb 2004 20:53:18 -0900
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[24.19.146.170])
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-> id <20040211055156016007ukqee>; Wed, 11 Feb 2004 05:51:56

+0000

-> Message-ID: <000801c3f063$2bf98ff0$6401a8c0@NEWCOMPUTER>
-> From: "Al Paxhia" <paxhia2@comcast.net>
-> To: <murphy-rebel@dcsol.com>
-> References: <001901c3f048$600619f0$ad05efd1@Thinkpad>
-> Subject: Exhaust system for IO540
-> Date: Tue, 10 Feb 2004 21:52:01 -0800
-> X-Orig-MIME-Version: 1.0
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-> X-Antivirus-Remover: Message was filtered through wsMailGuard (wsAV)
->
-> I just did 2.5 hours of testing with a new Forsling Aviation exhaust

system.

-> The data looks very good, but I'm not sure I understand it all.
-> Cylinder temps have dropped 30-35 degrees. They range from 326 to 360.

The

-> exhaust temperatures are more balanced. At cruise 23"MP and 2300 rpm,

full

-> rich now burns 16.4gal/hr this is an increase of .4 gal/hour, but when
-> leaning the temps are balanced to a flow of 13 gal/hour. If I go LOP

the

-> flow is even lower and temp are all good. Oil temp was about 190 about

the

-> same.
-> I've put some pictures out, if your interested.
-> If anyone is interested in the old system its for sale, it's a good

system

-> if your running a 260 hp, 540. Contact me offline.
-> Al
-> Moose, N526AP, paxhia2@comcast.net
->
->

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[gill.sr25]

Al,

I just uploaded an excel spreadsheet and graph of my CHT's from a February
15th flight. Thought you might find this interesting. File is in S-Engine
Category or under new files.

CHT#5 is higher than I like as this cylinder is right in from of my oil
cooler. The problem is worse in the summer months when I'm on floats.

I plan to try installing a small ducted scoop on the top of the cowl to push
air through my oil cooler. This should also stop the loss of cooling air from
around cylinder #5. Right now some of the potential cylinder 5 cooling air
gets diverted through the oil cooler.

The graph shows take off, a short flight to the cabin, temps rise and fall as
I do a few descents and climbs at the lake, then temps normalize as I crise to
Skwentna and back to Anchorage.

Chris



On 2/17/2004 2:53 PM, PAXHIA2@COMCAST.NET wrote to MURPHY-REBEL:

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-> Message-ID: <002501c3f4cc$29fe8e40$6401a8c0@NEWCOMPUTER>
-> From: "Al Paxhia" <paxhia2@comcast.net>
-> To: <murphy-rebel@dcsol.com>
-> References: <1076957897@dcsol.com>
-> Subject: Re: Exhaust system for IO540
-> Date: Mon, 16 Feb 2004 12:33:40 -0800
-> X-Orig-MIME-Version: 1.0
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->
-> Chris,
-> The OAT was 35-40 F on that day. Last week went up to Abbotsford, about an
-> hour flight, CHT was as high as 370 with the OAT in the high 50's(best
-> weather in a long time). Al
-> ----- Original Message -----
-> From: <gill.sr25@dcsol.com>
-> To: <murphy-rebel@dcsol.com>
-> Sent: Monday, February 16, 2004 10:58 AM
-> Subject: RE: Exhaust system for IO540
->
->
-> > Al,
-> >
-> > What OAT were you operating at when you were seeing the CHT's?
-> >
-> > Chris Gill
-> > SR2500, Anchorage, AK
-> > 907-227-9352
-> >
-> > On 2/16/2004 9:56 AM, PAXHIA2@COMCAST.NET wrote to MURPHY-REBEL:
-> >
-> > -> Received: by dcsol.com (Wildcat! SMTP Router v5.7.450.9b10)
-> > -> for murphy-rebel@dcsol.com; Tue, 10 Feb 2004 20:53:20 -0900
-> > -> Received: from ([204.127.202.64]) EHLO=sccrmhc13.comcast.net
-> > -> by dcsol.com (Wildcat! SMTP v5.7.450.9b10) with SMTP
-> > -> id 609685812; Tue, 10 Feb 2004 20:53:18 -0900
-> > -> Received: from NEWCOMPUTER (c-24-19-146-170.client.comcast.net
-> > [24.19.146.170])
-> > -> by comcast.net (sccrmhc13) with SMTP
-> > -> id <20040211055156016007ukqee>; Wed, 11 Feb 2004 05:51:56
-> +0000
-> > -> Message-ID: <000801c3f063$2bf98ff0$6401a8c0@NEWCOMPUTER>
-> > -> From: "Al Paxhia" <paxhia2@comcast.net>
-> > -> To: <murphy-rebel@dcsol.com>
-> > -> References: <001901c3f048$600619f0$ad05efd1@Thinkpad>
-> > -> Subject: Exhaust system for IO540
-> > -> Date: Tue, 10 Feb 2004 21:52:01 -0800
-> > -> X-Orig-MIME-Version: 1.0
-> > -> X-Orig-Content-Type: text/plain; charset="iso-8859-1"
-> > -> X-Orig-Content-Transfer-Encoding: 7bit
-> > -> X-Priority: 3
-> > -> X-MSMail-Priority: Normal
-> > -> X-Mailer: Microsoft Outlook Express 6.00.2800.1158
-> > -> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
-> > -> X-Antivirus-Remover: Message was filtered through wsMailGuard (wsAV)
-> > ->
-> > -> I just did 2.5 hours of testing with a new Forsling Aviation exhaust
-> system.
-> > -> The data looks very good, but I'm not sure I understand it all.
-> > -> Cylinder temps have dropped 30-35 degrees. They range from 326 to 360.
-> The
-> > -> exhaust temperatures are more balanced. At cruise 23"MP and 2300 rpm,
-> full
-> > -> rich now burns 16.4gal/hr this is an increase of .4 gal/hour, but when
-> > -> leaning the temps are balanced to a flow of 13 gal/hour. If I go LOP
-> the
-> > -> flow is even lower and temp are all good. Oil temp was about 190 about
-> the
-> > -> same.
-> > -> I've put some pictures out, if your interested.
-> > -> If anyone is interested in the old system its for sale, it's a good
-> system
-> > -> if your running a 260 hp, 540. Contact me offline.
-> > -> Al
-> > -> Moose, N526AP, paxhia2@comcast.net
-> > ->
-> > ->
-> >
-> >
-> >
-> >
-> >
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-> >
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-> >
-> >
-> >
->
->




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